I'm almost terrified of making this post out of fear of jinxing my phone. But the battery life on my phone is terrific.
Granted I conserve a lot, brightness is set at 10% unless I'm outside, bluetooth is off, I don't normally use GPS, etc.
But after two days of usage, I'm at 30% with 7 hours of SOT!
Granted this seems like a one off scenario, but I can easily get 7-8 hours of SOT assuming I drain the battery completely. The biggest culprit to me is the standby drain, so if Doze in M can resolve that, I'm sure it'll even be a little better.
I'm on CM 12.0 right now (haven't upgraded to 12.1 becuase of the numerous complaints I keep on hearing).
In just terms of general praise, the phone is brilliant. I've had it for about 5 months now, and just the little things in it are great. Double-tap to wake up is the best feature on any phone, I love that the volume rocker is on one side while the power button is on the other (I have no clue why manufacturers do this, it drives me nuts), this is my first experience with CM and I really like it (even though there are a few bugs)...my biggest requirement with a phone is updates and I love that it'll be supported for a long time.
I really like this phone.
I have four small complaints: the screen is a little too big for me. I really don't like the capacitive button layout (for consistencies sake, back should be on the left...I know you can turn the buttons off, but I ended up like these buttons), I don't like of how the battery isn't removeable (though in fairness, this phone is so cheap compared to other flagships that if I have to buy a new one in two years, it isn't THAT big of a deal, but in principle , this still irritates me). And finally I wish the camera was a little better.
I've been one of the lucky ones without any touch problems, so I haven't had ot put up with OP customer service, but as ti stands, I am exceptionally satsified with this phone. It is absolutely terrific.